<!-- ImagePreview -->
<template>
<!-- Root element of PhotoSwipe. Must have class pswp. -->
<div ref="pswp" class="pswp" tabindex="-1" role="dialog" aria-hidden="true">
    <!-- Background of PhotoSwipe.
      It's a separate element as animating opacity is faster than rgba(). -->
    <div class="pswp__bg"></div>
    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">
        <!-- Container that holds slides.
            PhotoSwipe keeps only 3 of them in the DOM to save memory.
            Don't modify these 3 pswp__item elements, data is added later on. -->
        <div class="pswp__container">
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>
        <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
        <div class="pswp__ui pswp__ui--hidden">
            <div class="pswp__top-bar">
                <!--  Controls are self-explanatory. Order can be changed. -->
                <div class="pswp__counter"></div>
                <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
                <!-- <button class="pswp__button pswp__button--share" title="Share"></button> -->
                <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>
                <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>
                <!-- Preloader demo https://codepen.io/dimsemenov/pen/yyBWoR -->
                <!-- element will get class pswp__preloader--active when preloader is running -->
                <div class="pswp__preloader">
                    <div class="pswp__preloader__icn">
                      <div class="pswp__preloader__cut">
                        <div class="pswp__preloader__donut"></div>
                      </div>
                    </div>
                </div>
            </div>
            <!-- <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
                <div class="pswp__share-tooltip"></div>
            </div> -->
            <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
            </button>
            <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
            </button>
            <div class="pswp__caption">
                <div class="pswp__caption__center"></div>
            </div>
        </div>
    </div>
</div>
</template>
<script>
import 'photoswipe/dist/photoswipe.css'
import 'photoswipe/dist/default-skin/default-skin.css'
import PhotoSwipe from 'photoswipe/dist/photoswipe.js'
import PhotoSwipeUIDefault from 'photoswipe/dist/photoswipe-ui-default.js'
// import { infoObject } from '@/api/aliyunoss.js'
export default {
  name: 'ImagePreview',
  data: function() {
    return {
      index: 0,
      items: [],
      images: []
    }
  },
  created: function () {
    const _that = this
    this.$nextTick(function () {
      var pswpElement = this.$refs.pswp
      // define options (if needed)
      var options = {
        // optionName: 'option value'
        // for example:
        index: _that.index // start at first slide
      }
      // Initializes and opens PhotoSwipe
      var gallery = new PhotoSwipe(pswpElement, PhotoSwipeUIDefault, _that.images, options)
      gallery.init()
      gallery.listen('destroy', function() {
        _that.$destroy(true)
      })
    })
  },
  destroyed() {
    document.body.removeChild(this.$el)
  }
}
</script>
